There were "banjo string" calls from the small creek here. Walking over to the bank, two frogs jumped in, but this one on the other side stayed put so that after about 3 minutes of scanning along the edge of the creek with binoculars I was able to spot him.
Apparently flew into the office building glass. It was still alive when I first saw it, but did not make it.
More visible yellow in flight. Can make out some of the yellow belly. Coloring like a sparrow on top. Three sound song with first two "notes" the same.